Size Range:2″ to 24″ (DN50-DN600)
Connection Options:Flanged, Threaded (NPT, BSP), Butt Weld, Socket Weld
Working Pressure:PN10/PN16
Working Temperature:-29°C to 425°C
Sealing Options:Metal-to-Metal, Resilient Seat, Graphite, PTFE
Manufacturing Method:Cast, Forged, Machined
Applicable Medium:Water, Oil, Gas, Steam, Chemical Fluids
The manual knife gate valve is a compact, low-maintenance solution designed for reliable shut-off in systems handling viscous, abrasive, or solid-laden media. Operated by a handwheel, it features a sharp-edged gate that cuts through slurry, pulp, or sludge with minimal flow resistance. Ideal for wastewater, mining, pulp & paper, and chemical industries, this valve offers tight sealing, simple structure, and ease of installation—making it a practical choice for on/off control in challenging flow conditions.
Nominal Pressure PN (MPa) | Test Pressure (MPa) | Working Temperature (℃) | Applicable Medium | |
|---|---|---|---|---|
| Shell | Seal | |||
| 1.0 | 1.5 | 1.1 | ≤100℃ (rubber) | Slag, pulp, sewage, cinder, ash, mud, oil |
| 1.6 | 2.4 | 1.8 | H / Y ≤ 425℃ | |
| Body, Cover | Gate | Stem | Sealing Surface |
|---|---|---|---|
| Stainless steel, carbon steel, gray cast iron | Carbon steel, stainless steel | Stainless steel | Rubber, PTFE, stainless steel, hard alloy |
| PN 1.6 MPa | ||||||||
|---|---|---|---|---|---|---|---|---|
| DN (mm) | L | D | D1 | D2 | H | N-M | D0 | Weight (Kg) |
| 50 | 50 | 160 | 125 | 100 | 285 | 4–M16 | 180 | 7 |
| 65 | 50 | 180 | 145 | 120 | 298 | 4–M16 | 180 | 8 |
| 80 | 50 | 195 | 160 | 135 | 315 | 4–M16 | 220 | 8 |
| 100 | 50 | 215 | 180 | 155 | 365 | 8–M16 | 220 | 10 |
| 125 | 50 | 245 | 210 | 185 | 400 | 8–M16 | 230 | 12 |
| 150 | 70 | 280 | 240 | 210 | 475 | 8–M20 | 280 | 14 |
| 200 | 80 | 335 | 295 | 265 | 540 | 8–M20 | 360 | 22 |
| 250 | 90 | 390 | 350 | 320 | 630 | 12–M20 | 400 | 36 |
| 300 | 100 | 440 | 400 | 368 | 720 | 12–M20 | 400 | 56 |
| 350 | 100 | 500 | 460 | 428 | 880 | 16–M22 | 400 | 66 |
| 400 | 120 | 565 | 515 | 482 | 990 | 16–M22 | 530 | 119 |
| 450 | 120 | 615 | 565 | 532 | 1120 | 20–M22 | 530 | 195 |
| 500 | 130 | 670 | 620 | 585 | 1200 | 20–M22 | 530 | 230 |
| 600 | 140 | 780 | 725 | 685 | 1480 | 20–M27 | 600 | 285 |
| 700 | 165 | 895 | 840 | 800 | 1700 | 24–M27 | 600 | 305 |
| 800 | 190 | 1010 | 950 | 900 | 1900 | 24–M30 | 600 | 385 |
| 900 | 200 | 1110 | 1050 | 1005 | 2200 | 28–M30 | 600 | 790 |
| PN 1.6 MPa | ||||||||
| DN (mm) | L | D | D1 | D2 | H | N-M | D0 | Weight (Kg) |
| 50 | 50 | 160 | 125 | 100 | 285 | 4–M16 | 180 | 7 |
| 65 | 50 | 180 | 145 | 120 | 298 | 4–M16 | 180 | 8.5 |
| 80 | 50 | 195 | 160 | 135 | 315 | 8–M16 | 220 | 9 |
| 100 | 50 | 215 | 180 | 155 | 365 | 8–M16 | 220 | 13 |
| 125 | 50 | 245 | 210 | 185 | 400 | 8–M18 | 230 | 15 |
| 150 | 70 | 280 | 240 | 210 | 470 | 8–M20 | 280 | 23 |
| 200 | 80 | 335 | 295 | 265 | 540 | 8–M24 | 360 | 31 |
| 250 | 90 | 390 | 350 | 320 | 635 | 12–M24 | 400 | 40.7 |
| 300 | 100 | 440 | 400 | 375 | 780 | 12–M24 | 400 | 65 |
| 350 | 100 | 500 | 460 | 428 | 875 | 16–M24 | 400 | 107 |
| 400 | 120 | 565 | 515 | 485 | 1060 | 16–M27 | 530 | 129 |
| 450 | 120 | 615 | 565 | 545 | 1190 | 20–M27 | 530 | 192 |
| 500 | 130 | 670 | 620 | 585 | 1260 | 20–M30 | 530 | 225 |
| 600 | 140 | 780 | 725 | 700 | 1450 | 20–M33 | 600 | 305 |
| 700 | 165 | 895 | 840 | 788 | 1700 | 24–M33 | 600 | 410 |
| 800 | 190 | 1010 | 950 | 888 | 1950 | 24–M36 | 600 | 570 |
| 900 | 203 | 1125 | 1050 | 988 | 2300 | 28–M36 | 680 | 820 |
Manual knife gate valves are widely used for reliable shut-off in systems handling thick, abrasive, or solid-laden media. Designed with a sharp-edged gate that cuts through slurry, pulp, or sediment, they offer dependable flow isolation in tough environments. Common applications include:
Wastewater Treatment Plants: For handling sludge, raw sewage, and grit.
Pulp & Paper Industry: Used in pulp stock lines and fiber recovery systems.
Mining & Mineral Processing: Effective for tailings, slurry, and abrasive slurries.
Power Plants: Suitable for ash handling and slag disposal.
Food & Sugar Industries: Used to control syrup, molasses, and similar viscous fluids.
The manual operation offers cost-effective flow control where automation is not required, especially in low-pressure or infrequent operation scenarios.
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